RC Columns Strengthened with NSM-CFRP Strips and CFRP Wraps under Axial and Uniaxial Bending: Experimental Investigation and Capacity Models

The efficiency of the use near-surface mounted (NSM) carbon fiber-reinforced polymer (CFRP) strips confined with CFRP wraps to strengthen reinforced concrete (RC) columns will be experimentally and analytically investigated in this paper. A total 15 specimens RC strengthened different numbers NSM-CFRP (0, 4, 8) 2, 4), prepared tested under concentric eccentric loading eccentricity ratios 0, 0.25, 0.50, 0.75, respectively. axial load capacity, lateral deflection (?), deflection, longitudinal transverse strains measured. effects strips, number layers, ratio on capacity specimen investigated. showed a significant increase load-carrying ductility over control specimens. uniaxial bending reached 49% 95%, respectively, specimen. It was concluded that strengthening wrapped composite sheets enhanced both consistently, for all applied ratios. In addition, an analytical model developed predict strength NSM-CFRP-strengthened validated using obtained experimental results.